libertas: remove lots of unused stuff

This removes many unused function parameters as well as some not-implemented
functions, e.g. CMD_802_11_GET_STATS. The silly lbs_set_cmd_ctrl_node()
function is now also gone.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/join.c b/drivers/net/wireless/libertas/join.c
index 56e64a6..3e5026f 100644
--- a/drivers/net/wireless/libertas/join.c
+++ b/drivers/net/wireless/libertas/join.c
@@ -561,8 +561,7 @@
 	return ret;
 }
 
-int lbs_cmd_80211_ad_hoc_stop(struct lbs_private *priv,
-				struct cmd_ds_command *cmd)
+int lbs_cmd_80211_ad_hoc_stop(struct cmd_ds_command *cmd)
 {
 	cmd->command = cpu_to_le16(CMD_802_11_AD_HOC_STOP);
 	cmd->size = cpu_to_le16(S_DS_GEN);
@@ -773,8 +772,7 @@
 	return ret;
 }
 
-int lbs_ret_80211_disassociate(struct lbs_private *priv,
-				 struct cmd_ds_command *resp)
+int lbs_ret_80211_disassociate(struct lbs_private *priv)
 {
 	lbs_deb_enter(LBS_DEB_JOIN);
 
@@ -863,8 +861,7 @@
 	return ret;
 }
 
-int lbs_ret_80211_ad_hoc_stop(struct lbs_private *priv,
-				struct cmd_ds_command *resp)
+int lbs_ret_80211_ad_hoc_stop(struct lbs_private *priv)
 {
 	lbs_deb_enter(LBS_DEB_JOIN);